Shishuang Sun
Missouri University of Science and Technology
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Publication
Featured researches published by Shishuang Sun.
Smart Materials and Structures | 2005
Genda Chen; Shishuang Sun; David Pommerenke; James L. Drewniak; Gary G. Greene; Ryan D. McDaniel; Abdeldjelil Belarbi; Huimin Mu
A new concept of designing cable sensors for health monitoring of large-scale civil infrastructure has recently been proposed by the present authors. The concept was developed based on the change in topology of the outer conductor of a coaxial cable sensor. One such sensor was fabricated with its outer conductor tightly wrapped with a commercial tin-plated steel spiral that was covered with solder. It was mounted near the surface of a 15 m long reinforced concrete (RC) girder with a 762 mm square hollow cross section and 152 mm thick walls. The girder was tested under a progressively increasing cyclic torsion creating 45° inclined cracks around and along the girder. The main objectives of this study were to implement the distributed cable sensor technology in large-scale reinforced concrete structures, to understand the performance of a sensor under cyclic loading for detecting and locating cracks, and, finally, to address implementation issues such as signal loss, non-uniformity in sensor construction, and recoverability.
Proceedings of the Smart Structures and Materials Conference 2004 -- Sensors and Smarth Structures Techonologies for Civil, Mechanical, and Aerospace Systems (2004, San Diego, CA) | 2004
Shishuang Sun; David Pommerenke; James L. Drewniak; Genda Chen
Configuration-based coaxial cable sensors have recently been developed to detect cracks in reinforced concrete (RC) structures. These sensors have shown a high sensitivity when applied to several short RC flexural members. However, the signal losses resulting from a long cable sensor may distort the initial waveform of the electromagnetic wave propagating along the cable, thereby compromising the spatial resolution and sensitivity of this sensor. The signal losses consist of the contributions from the skin effect of conductors, energy absorption in the dielectric material, and impedance mismatch loss due to multiple signal reflections resulting from discontinuities caused by the separation between the adjacent spirals, which acts as the outer conductor of a cable sensor. This paper summarizes the basic physics of signal losses in cable sensors, and investigates the impact of the signal losses on the spatial resolution and sensitivity of a cable sensor over distance. Several methods are proposed to simulate and quantify various factors affecting the signal losses.
Nondestructive Evaluation and Health Monitoring of Aerospace Materials, Composites, and Civil Infrastructure IV | 2005
Genda Chen; Ryan D. McDaniel; David Pommerenke; Shishuang Sun
A new design of distributed crack sensors is presented for the condition assessment of reinforced concrete (RC) structures during and immediately after an earthquake event. This study is mainly focused on the performance of cable sensors under dynamic loading, particularly their ability to memorize the crack history of an RC member. This unique memory feature enables the post-earthquake condition assessment of structural members such as RC columns, in which the earthquake-induced cracks are closed immediately after an earthquake event due to gravity loads and they are visually undetectable. Factors affecting the onset of the memory feature were investigated experimentally with small-scale RC beams under cyclic loading. Test results indicated that both crack width and the number of loading cycles were instrumental in the onset of the memory feature of cable sensors. Practical issues related to dynamic acquisition with the sensors were discussed. The sensors were proven to be fatigue resistant from the shake table tests of RC columns. They continued to show useful signal after the columns can no longer support additional loads.
Proceedings of DesignCon 2008 (2008, Santa Clara, CA) | 2004
Iliya Zamek; Peter Boyle; Zhe Li; Shishuang Sun; Xiaohe Chen; Tun Li; Daryl G. Beetner; James L. Drewniak; Sandeep K. R. Chandra
international symposium on electromagnetic compatibility | 2004
Shishuang Sun; Geping Liu; David Pommerenke; James L. Drewniak; Richard W. Kautz; Chingchi Chen
Smart Structures and Systems | 2005
Genda Chen; Ryan D. McDaniel; Shishuang Sun; David Pommerenke; James L. Drewniak
international symposium on electromagnetic compatibility | 2006
Shishuang Sun; David Pommerenke; James L. Drewniak; Kai Xiao; Sin-Ting Chen; Tzong-Lin Wu
Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure (2003, Tokyo, Japan) | 2003
Genda Chen; Shishuang Sun; X. L. Shen; David Pommerenke; Gary G. Greene; Abdeldjelil Belarbi; Huimin Mu
Proceedings of DesignCon 2011 | 2011
Liehui Ren; Daryl G. Beetner; Shishuang Sun; Peter Boyle; Matt Scheppers; Colin Stagner; Manish Deo; James L. Drewniak
international symposium on electromagnetic compatibility | 2006
Shishuang Sun; James L. Drewniak; David Pommerenke